/*
 * Copyright (C) 2016-2017 Junjiro R. Okajima
 *
 * This program, aufs is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */

#include <ctype.h>
#include <stdio.h>

#include "au_util.h"

char *au_decode_mntpnt(char *src, char *dst, int len)
{
	char *p = dst;

	while (*src && len > 0) {
		if (isgraph(*src)) {
			*p++ = *src;
			len--;
		} else if (len > 4) {
			sprintf(p, "\\%03o", *src);
			p += 4;
			len -= 4;
		} else
			return NULL;
		src++;
	}
	if (len > 0) {
		*p = 0;
		return dst;
	} else
		return NULL;
}
